Resonance in quantum dot fluorescence in a photonic bandgap liquid crystal host

Microcavity resonance is demonstrated in nanocrystal quantum dot fluorescence in a one-dimensional (1D) chiral photonic bandgap cholesteric-liquid crystal host under cw excitation. The resonance demonstrates coupling between quantum dot fluorescence and the cholesteric microcavity. Observed at a ban...

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Bibliographic Details
Published inOptics letters Vol. 37; no. 7; p. 1259
Main Authors Lukishova, Svetlana G, Bissell, Luke J, Winkler, Justin, Stroud, Jr, C R
Format Journal Article
LanguageEnglish
Published United States 01.04.2012
Subjects
Cholesterol - chemistry
Equipment Design
Fluorescence
Fluorescence Polarization
Lasers
Liquid Crystals - chemistry
Microscopy, Polarization - instrumentation
Microscopy, Polarization - methods
Photons
Quantum Dots
Stereoisomerism
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Summary:Microcavity resonance is demonstrated in nanocrystal quantum dot fluorescence in a one-dimensional (1D) chiral photonic bandgap cholesteric-liquid crystal host under cw excitation. The resonance demonstrates coupling between quantum dot fluorescence and the cholesteric microcavity. Observed at a band edge of a photonic stop band, this resonance has circular polarization due to microcavity chirality with 4.9 times intensity enhancement in comparison with polarization of the opposite handedness. The circular-polarization dissymmetry factor g(e) of this resonance is ~1.3. We also demonstrate photon antibunching of a single quantum dot in a similar glassy cholesteric microcavity. These results are important in cholesteric-laser research, in which so far only dyes were used, as well as for room-temperature single-photon source applications.
ISSN:1539-4794
DOI:10.1364/OL.37.001259